Martin is one of the world’s most experienced security experts. His book The Rules of Security shows how the threats to our security today are complex and continually evolving. Criminals, hackers, terrorists and hostile foreign states continually find new ways of staying one step ahead of us, while we are continually creating new vulnerabilities as we adopt new technologies and new ways of working. Shortland is a Reader in Political Economy specialising in Somali piracy. Her book Kidnap: Inside The Ransom Business investigates the strange trade of hostage-taking and asks: What would be the ‘right price’ for your loved one – and can you avoid putting others at risk by paying it? What prevents criminals from maltreating hostages? And why would kidnappers release a potential future witness after receiving their money? Bullough is author of Moneyland.